Steam-turbine.



J. F. M. PATITZ.

$TEAM TURBINE- APPLIOATION man) MAIL 1909.

1L 1 9 1 00 1 6 m J d W n m P WITNESSES:

J F. M. PATITZ.

STEAM TURBINE.

APPLICATION ITILED HABJ, 1909. 95 3i Patented June 13, 191.1.

2 SHEETS-SHEET 2.

INVENTUR ATTUR/QEY entrain sras iasrarrnnr re JOHANN F. M. PATITZ, OF MILWAUKEE, WISCONSIN, ASSIG-NOR TO ALLIS-CHALMERS COMPANY, OF MILWAUKEE, WISCONSI N, A CORPORATION OF NEVJ JERSEY.

assess.

To all whom it may concern:

Be it known that I, JOHANN Fninonion MAX PATITZ, a citizen of the United States.

. residing at Milwaukee. in the county of Milwaukee and State of W'isconsin, have invented a certain new and useful Improvenrent in Steam-Turbines, of which the following is a specification.

This invention relates to improvements in the construction of fluid pressure turbines.

The objects of the invention are to provide a means by which the spindle of a fluid prcssure'ttu'bine may be built up of a series of disks, and also to procure a suitable fastening for the blades or buckets to said disks base. 7

A clear conception of the invention ca be obtained by referring to the accompanying drawingsin which like reference characters designate like parts in ditferent views.

Figure l is an enlarged fragmental st. tional plan view of one of the disks comprising the spindle of a reaction turbine. Fig. 2 is -a similar side View of same. l ig. 3- is an enlarged fragn'icntal sectional plan view of one. of the disks con'iprising the Spindle ofan action or velocity turbine. Pig. 4 is a similar side view of same. Fig. 5 is a view similar to that shown in Fig. i4, showing a preferred form of the fastening means. Fig. (3 is a tragmental central vertical section of a reaction turbine built according to the invention. Fig. is an enlarged fraginental side View of one of the disks showing the application of the modified blade fastening of Fig. Fig. 3 is an enlargement of a sectional fragment of the blading as shown in Fig. 6.

The reaction turbine of Fig. \3 has disks 2 of which there is one for each set of movable, blades The disks are cmiccnlric with the turbine shaft 10, and are attached to the shaft 10 in any suitable manner, not shown. The movable blades 3, of which there are a number of sets, the sets increasing in size as they approach the exhaust end of the turbine, are radial to the shaft .10, and have their outer ends connected to ring shroudings'ltl, see Figs. '7, S. In this reaction type of turbine, the outer casing 12 supports several series of stationary blades 11 which are also concenti": and rad'al to the shaft 10, and Whose ends are also connected 'to suitable shrouding rings. The various sets of stationary blades 11 alternate in their Specification of Letters Patent.

Application filed March 1, 1909.

Patented June 13, 1911. Serial No. 180,526.

successive positions with the sets of movable blades 3. In the action type of turbine, not shown complete, the stationary blades 11 are replaced by walls and nozzles, the general structure and relative positions of the nozzles and blades 3 remaining the same. Or, a single disk Wheel may of course sutlice.

The series of disks 2, Fig. 6, are spaced from each other by means 0t the rings 1. These rings 1 are concentric with the shaft 10 and are prevented from breaking, due to centrifugal force, by' the flanges l6 extending out from the disks 2, see Figs. 6, 8. The disks and are held in place by any suitable end clamping means,-not shown. The rings 1 may be formed directly on the side of tl'ie'disks 2, in which case the flanges (i are unnecesstaaryi In fastening the blades 3 into the disks .2, a series of slots 4, having notches 7, are formed about the periphery of each disk 2, see Figs. 1, 2, 3, 4, 5. These slots are pretcrably made, as shown in Fig. 5, sloping slightly away from the body of blades 3 and toward the notches 7. In other words, taey are oblique to the peripheral surface of the disk or base and the notch is in the slot wall at an acute angle to said peripheral surface. The ends (3 of the blades 3 are made to fit the slots 4 and have projections 5 which register with the notches 7. projections?) are formed by stan'iping the blade 'cnds slightly thinner than the stock except at the projections.

The stationary blades 11 can be fastened to the casing 12 in any convenient manner. As shown. see Fig. 8, the ring 14; has slots and notches cut in it which correspoi'id in shape to the ends (3 and projections 5 on said ends 6 of the blades ll. held in a groove in the casing 12 by a calking strip l5. No claim is made herein to this combination as it is the further adaptation b another of the fastening means herein claimed.

in constructing a turbine accoriing to this invention, the disks 2 are fir I turned concentric with the shaft 10. e slots 4 and notches 7 are then cut into the disks The blades 3 having the ends 6 are then laterally pressed into the slots i, the projections 5 .coactingwith the notches 7. The blade ends are left to project slightly from the sides of the disks and are thGH'SUlJJGCl'BCl to lateral pressure to reset them within the slots as These The ring it extra holding effect is produced much as possible. By sloping the end 6 of t of the said slots at substantially similar locathe blade 3 back as shown in Fig. 5, an l tions in said slots as to depththerein, and

of a'straight blade.

After the blades3 have been placed, the rings l' are assembled in place. The blades 11 are then pressed into slots in the rings 14, which rings are inserted into the grooves in the casing 12and calked into place.

It shohld be understood that it is not desii ed to be limited to the exact details of construction shown and described, for obvious modifications "will occur to a person skilled in the art. g

It \is claimed and desired to secure by Let- 1 ters Patent:

1. In a blade fas tening for turbines, the

' combination dfa base having slots therein,

a notch formed in each of the similar sides of said -slots, and blades each havingan end-formed with a projection on a side thereof and beiiig plane on the opposite side thereof opposite the said projection, said projection on each of said blades coacting with a notch in one of said slots and the 'lane portion opposite said projection coactmg witha wall of said slot.

tions within said slots.

In a' blade fastening, a base having a slottherein oblique to the base surface and h'avin a-notchin a side wall'thereof and space from the bottom of said slot, and a blade having an end at an angle thereto and a projection thereon, said end coacting with said slot and said projection with said notch vhcrcby said blade is .held substantially radially.

4. In a-blade' fastening for turbines, the combination of a base having slots therein,

a notch formed in each of the similar sides over that projection blades each having an end formed with a on a side thereof and being smooth 011 the opposite side thereof opposite the said projection, said projection on each of said blades coacting with a notch in one of said slots and the opposite smooth side of the blade opposite said projectionfitting a wall of said-slot.

In a blade fastening, a base having a slot therein oblique to the base surface and having a'notch in the wall of the slot acute to said base surface, and a blade having an end at an angle thereto and a projection thereon, said end coacting with said slot and said projection with said notch whereby said blade is held substantially radially.

(3'. In a turbine, a shaft, a plurality of disks thereon, a spacing mean sbetween each two consecutive disks, andblades secured to said disks, saidspacing means lying directly opposite the secured ends of the blades whereby said blades are laterally held in place.

- 7. In a turbine, a plurality of disks, slots formed near the peripheries of said disks, blades having ends coacting with said slots and fastened therein, and means interposed between consecutive disks for spacing said disks apart, said means coacting with said disks opposite said slots.

8. As an article of manufacture,"a blade formed from blade'shaped stock having an end stamped thinner than the blade 'stock and having a lateral projection on the stamped end the thickness of said end at said projection being within the maximum thickness of the blade-shaped stock.'

In testimony whereof, I affix my signature in the presence Y J. F. M. PATITZ; Witnesses:

H. C. Cass, G. F. Di: WEIN.

of two witnesses. 

